netdev - Re: 3.0.0rc6: ethtool not working without a cable

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Date:	Wed, 6 Jul 2011 16:53:04 +0200
From:	Arkadiusz Miskiewicz <a.miskiewicz@...il.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	netdev@...r.kernel.org
Subject: Re: 3.0.0rc6: ethtool not working without a cable

On Wednesday 06 of July 2011, Ben Hutchings wrote:
> On Wed, 2011-07-06 at 13:38 +0200, Arkadiusz Miskiewicz wrote:
> > 3.0.0rc6, thinkpad t400 notebook.
> > 
> > If there is no cable then ethtool reports no device. It wasn't that
> > before AFAIK.
> > 
> > ethtool version 2.6.36
> > 
> > 
> > cable disconnected:
> > 
> > [root@...0 ~]# ethtool eth0
> > Settings for eth0:
> > Cannot get device settings: No such device
> > Cannot get wake-on-lan settings: No such device
> > Cannot get message level: No such device
> > Cannot get link status: No such device
> > No data available
> > zsh: exit 75    ethtool eth0
> > [root@...0 ~]# ethtool -i eth0
> > Cannot get driver information: No such device
> > zsh: exit 71    ethtool -i eth0
> 
> [...]
> 
> Then there really isn't a device under that name.  Maybe the driver is
> getting a bogus MAC address, so that the device is renamed by udev.

No, no, device exists:

[arekm@...0 ~]$ ip l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state 
DOWN qlen 1000
    link/ether 00:21:86:a2:19:06 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc sfq state UP qlen 
1000
    link/ether 00:16:eb:05:5d:08 brd ff:ff:ff:ff:ff:ff
[arekm@...0 ~]$ ethtool eth0
Settings for eth0:
Cannot get device settings: No such device
Cannot get wake-on-lan settings: No such device
Cannot get message level: No such device
Cannot get link status: No such device
No data available
zsh: exit 75    ethtool eth0
[arekm@...0 ~]$


-- 
Arkadiusz Miśkiewicz
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